inskeep, co-host of morning edition on npr and the author of this book, his first book, "instant city: life and death in catchy." karachi." steve inskeep, what happened in karachi on december 20, 2000? >> i'll let you and thanks by the way for the invitation and what for you guys are doing. on december 20, 2009 there was a religious procession in the middle of this gigantic mega- city, one of the rapidly growing megacities in the world that was bomb. it's a tragic story but when you begin digging into the details of that single day, peeling back the layers, what i discovered was the star that to me a loom and it's the way the world is developing, the way the world is going. the way that different kinds of people are coming together in cities, sometimes quite violently, and thrashing out our future. this is an event i learned about that became this book. now, how many people were killed, who bombed to? >> about three dozen people. saying precisely who bombed who is challenging, but in the end it turned out to be am at least according to the authorities, a militant group which is why ma